Motion blur bug #47873

New Issue

Artturi Mäntysaari · 2016-03-21T08:07:36+01:00

2016-03-21 08:07:36 +01:00

System Information
Operating system and graphics card
Win 7, (CPU render)

Blender Version
Broken: 2.77

Worked: (optional)

Short description of error
Some frames in my file seems to have bug with motion blur, or something similar. Animation is done with explosion modifier and the pieces are very close of each other.

Exact steps for others to reproduce the error
Based on a (as simple as possible) attached .blend file with minimum amount of steps
Not exactly sure what causes the problem, so here is the file and my Blender artists thread.
http://blenderartists.org/forum/showthread.php?395124-Random-blurry-artifacts-in-cycles-rendering

**System Information** Operating system and graphics card Win 7, (CPU render) **Blender Version** Broken: 2.77 Worked: (optional) **Short description of error** Some frames in my file seems to have bug with motion blur, or something similar. Animation is done with explosion modifier and the pieces are very close of each other. **Exact steps for others to reproduce the error** Based on a (as simple as possible) attached .blend file with minimum amount of steps Not exactly sure what causes the problem, so here is the file and my Blender artists thread. http://blenderartists.org/forum/showthread.php?395124-Random-blurry-artifacts-in-cycles-rendering

Artturi Mäntysaari commented

2016-03-21 08:07:36 +01:00

Changed status to: 'Open'

Artturi Mäntysaari commented

2016-03-21 08:07:36 +01:00

Added subscriber: @ArtturiMantysaari

Artturi Mäntysaari commented

2016-03-21 11:27:36 +01:00

I could not edit this bug report, so here is some additional info:

If I unselect motion blur, the problem does not happen anymore in those frames.
I started this project with 2.6a and then I downloaded 2.77 and noticed the same problem also there.
Frames with that problem takes lot more time to render than other frames.
If I apply solidify modifier, the problem does not happen anymore (but the quality of the animation is not what I was targeting)

I could not edit this bug report, so here is some additional info: If I unselect motion blur, the problem does not happen anymore in those frames. I started this project with 2.6a and then I downloaded 2.77 and noticed the same problem also there. Frames with that problem takes lot more time to render than other frames. If I apply solidify modifier, the problem does not happen anymore (but the quality of the animation is not what I was targeting)

Sergey Sharybin commented

2016-03-22 13:05:28 +01:00

Added subscriber: @Sergey

Sergey Sharybin commented

2016-03-22 13:05:28 +01:00

Changed status from 'Open' to: 'Archived'

Sergey Sharybin closed this issue

2016-03-22 13:05:28 +01:00

Sergey Sharybin self-assigned this 2016-03-22 13:05:28 +01:00

Sergey Sharybin commented

2016-03-22 13:05:28 +01:00

It usually saves time if the small file attached directly to the report, we don't have time to follow forums anyway.

The issue with your setup is that the object changes topology, which isn't supported by Cycles -- when using deformation motion blur the topology should match across all frames. This isn't a bug but rather a known limitation. Thanks for the report anyway.

It usually saves time if the small file attached directly to the report, we don't have time to follow forums anyway. The issue with your setup is that the object changes topology, which isn't supported by Cycles -- when using deformation motion blur the topology should match across all frames. This isn't a bug but rather a known limitation. Thanks for the report anyway.

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Motion blur bug #47873